AGENDA
ITEM
20 AGENDA
CALEXICO California ITEM
WHERE CALIFORNIA AND MEXICO MEET
20 CITY COUNCIL
AGENDA STAFF REPORT
DATE: June 5, 2024
Mayor and City Council
REVIEWED BY: Sandra L. Fonseca, Interim Finance Director PREPARED BY: Liliana Falomir, Public Works Manager - Administrative Tale SUBJECT: Authorize City Manager to Sign Change Order No. 4, 5, 6 and 7 with Mountain Cascade, Inc. in the Amount of $948,811.78 for the New River Improvement Project - Calexico Reach.
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Recommendation:
Authorize City Manager to Sign Change Order No. 4, 5, 6 and 7 with Mountain Cascade, Inc. in the amount of $948,811.78 for the New River Improvement Project - Calexico Reach.
Background:
On February 15, 2023, the City Council of the City of Calexico awarded Mountain Cascade, Inc. the bid for construction services of the New River Improvement Project - Calexico Reach in the amount of $40,690,908.04. The project consists of three primary construction components:
1. Trash screen and diversion structure for the New River downstream from the International Boundary with Mexico.
2. Bypass encasement infrastructure for the New River from a point downstream of the International Boundary to a point downstream of the eastern boundary of the City of Calexico to address the public health threat that New River water quality poses to the southern area of the city.
3. A pump-back system to take treated wastewater from the existing Calexico Wastewater Treatment Plant (WWTP) and discharge it into the New River channel at a point near the proposed river diversion and encasement structure.
On October 4, 2023, the City Council of the City of Calexico authorized the City Manager to sign Change Order No. 1 with Mountain Cascade, Inc. in the amount of $282,500.00 and authorize City Manager to approve any future change orders not-to-exceed $610,363.62 (1.5% of Mountain Cascade, Inc. base bid) as per City Ordinance No. 1218.
Here is a list of change orders that have been approved since December 20, 2024:
# Description Amount
Change Order No. 1
72" CCFRFPM Pipe Freight Delivery/Mobilization (Calculation 139 Error in Bid Item) $57,500.00
New River East Access - Change of Condition from bidding, required additional work to access east side of River for sheet piling work at NR diversion structure area, reduction of workspace CO1a area $47,042.73
Transfer Yard Clean-up of City property adjacent to Hensel C01b Phelps property $31,754.48
Standby Time Delay for Equipment due to no encroachment CO1c permit & Hensel Phelps property not being available $114,812.70 Total $251,109.91
Change Order No. 2
New River East Access - Change of Condition from bidding, required additional work to access east side of River for sheet piling work at NR diversion structure area, reduction of workspace CO2a area $24,465.09
Transfer Yard Clean-up of City property adjacent to Hensel CO2b Phelps property $0.00
Standby Time Delay for Equipment due to no environmental CO2c clearance & Hensel Phelps property not being available. $109,899.84 Total $134,364.93
Change Order No. 3
1 Pothole and Verify Existing Sewer Line Invert Elevation $10,346.00 2 Construction Staking $17,865.00
Temporary Sewer Bypass to Allow for Construction of 18-inch 3 Sewer Pipe and Sewer Manholes $158,402.00
4 Remove and Dispose Existing Sewer Manholes $19,958.00 5 Remove and Dispose Existing 18" VCP Sewer Pipe $107,940.00 Furnish and Install 5-ft Diameter Sewer Manhole, including 6 Manhole Coating $104,697.00
Furnish and Install 18-inch Diameter PVC Sanitary Sewer, including Trenching, Backfill and Compaction to 90% Relative 7 Compaction $60,060.00
Temporary Sewer Bypass to Allow for Construction of 30-inch 8 Sewer and Sewer Manhole $182,384.00
9 Remove and Dispose Existing 30-inch VCP $128,800.00
Furnish and Install 30-inch Diameter PVC Sanitary Sewer, including Trenching, Backfill and Compaction to 90% Relative 10 Compaction $213,360.00
2 Pressure Testing of Sewer Pipe, including 18-inch and 30-inch 11 Diameter Pipes $26,011.00
12 Concrete Encasement 30-inch Sewer Pipe (24-ft length of pipe) $20,964.00 Total $1,050,787.00
Discussion and Analysis:
On a weekly basis, the State of California Department of Water Resources, City staff, Dynamic Consulting Engineers, Inc. and Mountain Cascade, Inc. meet to discuss the construction progress of the New River Improvement Project (NRIP) - Calexico Reach. Due to additional work not anticipated during the design phase, environmental clearances and change conditions after bidding, City staff is recommending that the City Council of the City of Calexico approve the following change orders:
# Description Amount
Change Order No. 4
New River East Access - Change of Condition from bidding, required additional work to access east side of River. Temporary 4a $63,580.33
backfill at diversion channel excavation & removal/stockpile 11/6/23 through 12/12/2023 in MCI billing #9 (December) Standby Time Delay for Equipment due to combination of no 4c.1 encroachment permit (until 10/4, Hensel Phelps property not being $98,402.74 avallable, & Environmental Clearance (Owls). From 10/2 through 10/31 in MCI billing #8 (November)
Standby Time Delay for Equipment due to Environmental
4c.2 Clearance (Owls) & 30" sewer crossing. From 11/01 through $54,100.09 11/30/23 in MCI billing #9 (December)
Second Street Mall Property rental. This is required due to not having sufficient staging, operations, stockpile & transfer yard at the location for the diversion channel work area at the southwest side of the New River. This was brought up early in the project and 4d $60,000.00
City agreed at the time to pay for rental. The rental amount currently is $5,000 per month for seven months 06/23 through 12/2023 in MCI billing #9 (December) & through the 12 months to 6/23/2024 since work will continue to at least that point.
Burrowing Owl & Erosion Gulley backfill. The westerly top bluff over the New River had
environmental clearance using burrowing owl protocols to ensure the top bluff area was clear for equipment to work, and to stage, move materials and equipment, including stockpile/staging of 72" 4e pipe. The area had many eroded gulleys, holes, depressions, $51,227.66 broken rubble, and other areas that burrowing owls have used, use, and can use for burrows. Once the environmental monitor cleared burrows, the burrows were collapsed, and MCI filled in these areas with stockpiled material. Unfortunately, owls can return to the area, which they have done, so this item may require 3 additional future work if needed. This extra work item was for labor and equipment from 11/27/2023 through 12/6/2023 in MCI billing #9 (December).
RFI 2.1 Seismic Controller & Actuator Required Changes to Electrical: In response to RFI 2.1, MCI provided the requirec actuator revised by MBI project specifications. This requires 4f $90,864.54
changes to integrated equipment and MBI updated electrical drawings. MCI provided this change order for additional costs to Total $418,175.36
Change Order No. 5
Substitution Request 001R3 - 72" Pipe Zone Soil Cement
Backfill; Use of soil cement in lieu of ¾" rock, mirafi fabric and trench dam/cut off walls for the 72" NR Bypass pipeline. There is 5a ($198,096.72)
a cost savings of $198,096.72 per approved substitution request. However, additional cost savings may be obtained with re-evaluation of soil cement strength, to be determined.
Substitution Request 004, DIP to PVC C900 Pump Back Sewer Force Main. Originally a no cost change order for using the plastic pipe. Subsequently, City added use of bell restraints at selected 5b locations which results in a net increase of $30,017.17 agreed $30,017.17 price for 40 restraints. Plan to restrain one joint on both sides of fittings with assumed 20 fittings. Final cost depends on how many restraints are constructed in place.
Standby Time Delay for Equipment due to 30" sewer crossing 5c preventing access for west slope excavation & hauling. From $80,749.62 12/01/23 through 12/31/23 in MCI billing #10 (January 2024).
Shoring Rental through January 31, 2024; in MCI billing #10 (January 2024). Due to delays, MCI schedule to complete ir 5d Vovember 2023 with removals December 2023. This monthly $34,500.00 shoring rental starts January 2024 to continue until project completion.
Total ($52,829.93)
Change Order No. 6
6a Shotcrete of the four transition slopes in the diversion channel. The four transition slopes in diversion channel were built up with compacted class 2 aggregate base. Concern of risk to integrity of $37,087.50 future storm events eroding portions of the southerly compacted transition slopes due to the [potential large New River flows a temporary shotcrete was placed over transitions to protect the compacted transition slopes integrity.
6b All-weather surfacing class 2 base emergency access & detour route. The temporary detour access for the WWTP, Animal Sheltel and airport hangar users for Animal Shelter Road closure during the 16" sewer force main required an all-weather access. This 4 access is routed along the west side of the Calexico Airport, $74,541.94 adjacent to the perimeter chain link fence, using unimprovec earthen roads adjacent to an IID All American Canal bank. The underlying soils are clayey/silts which are inaccessible when wet.
Class 2 aggregate base material was determined the least expensive that would serve as all-weather surfacing for the detour and serve as an emergency access.
6c Shoring Rental February through May 2024; in MCl billing #11, 12 & 13 (May 2024). Due to delays, MCI schedule to complete in November 2023 with removals December 2023. This monthly $138,000.00 shoring rental started January 2024 in CCO 5, to continue until project completion. (Feb, March, April, May)
Total $249,629.44
Change Order No. 7
7a This change order is a continuation of prior CO's for change in conditions from what the site was like at time of bid. At the diversion structure by the trash rack, both sides of the New River were clear and had direct access for equipment and personnel.
By the time the project started, security fencing and parking lot $333,836.91 improvements were constructed for the Calexico border crossing so that the East side of the River was completely inaccessible.
This caused additional work in previous CO's and for this CCO, the need to bring in bigger, powerful equipment to finish the work.
This CCO 7 is for an original excavator-mounted sheet pile driver to a 200 ton crane, which is significantly larger to remove the cofferdam sheet piles from the east side of the New River.
Total $333,836.91
Fiscal Impact:
Capital Improvement Program Budgeted Item for FY 2023-2024 Revenue - Fund No. 475-91-902
DWR Grant - Construction $43,075,981.66
Sub-Total $43,075,981.66
Expenditures - Fund No. 475-91-902
Mountain Cascade, Inc. - Original Bid $40,690,908.04
Mountain Cascade, Inc. - Change Order No. 1 $251, 109.91 Mountain Cascade, Inc. - Change Order No. 2 $134,364.93 Mountain Cascade, Inc. - Change Order No. 3 $1,050,787.00 Mountain Cascade, Inc. - Change Order No. 4 $418,175.36 Mountain Cascade, Inc. - Change Order No. 5 ($52,829.93) Mountain Cascade, Inc. - Change Order No. 6 $249,629.44 Mountain Cascade, Inc. - Change Order No. 7 $333,836.91 $43,075,981.66
5 Coordinated With:
California Department of Water Resources.
City Manager's Office.
Public Works Department.
Office of the City Clerk.
Attachments):
1. Mountain Cascade, Inc. Change Order No. 4
2. Mountain Cascade, Inc. Change Order No. 5.
3. Mountain Cascade, Inc. Change Order No. 6.
4. Mountain Cascade, Inc. Change Order No. 7.
ATTACHMENT NO. 1
CITY OF CALEXICO
PUBLIC WORKS DEPARTMENT
CHANGE ORDER NO. 4
Name of Project: New River Improvement Project - Calexico Reach ELIE
CALEXICO Name of Contractor: Mountain Cascade, Inc.
Date: June 5, 2024
# Description Price Price Time
Increase Decrease Extension
New River East Access - Change of Condition from bidding, required additional work to access east side of River. Temporary backfill at diversion 4a channel excavation & removal/stockpile 11/6/23 through 12/12/2023 in $63,580.33 MCI billing #9 (December) 37 days
Standby Time Delay for Equipment due to combination of no encroachment permit (until 10/4, Hensel Phelps property not being $98,402.74 4c.1
available, & Environmental Clearance (Owls). From 10/2 through 10/31 in Final extension MCI billing #8 (November) based on TIA
Standby Time Delay for Equipment due to Environmental Clearance (Owls) 4c.2 & 30" sewer crossing. From 11/01 through 11/30/23 in MCI billing #9 $54,100.09 Final extension (December) based on TIA
Second Street Mall Property rental. This is required due to not having sufficient staging, operations, stockpile & transfer yard at the location for the diversion channel work area at the southwest side of the New River. 4d This was brought up early in the project and City agreed at the time to pay $60,000.00 for rental. The rental amount currently is $5,000 per month for seven months 06/23 through 12/2023 in MCI billing #9 (December) & through the 12 months to 6/23/2024 since work will continue to at least that point.
Burrowing Owl & Erosion Gulley backfill. The westerly top bluff over the New River had burrowing owls that required environmental clearance using burrowing owl protocols to ensure the top bluff area was clear for equipment to work, and to stage, move materials and equipment, including stockpile/staging of 72" pipe. The area had many eroded gulleys, holes, depressions, broken rubble, and other areas that burrowing owls 4e have used, use, and can use for burrows. Once the environmental monitor $51,227.66 cleared burrows, the burrows were collapsed, and MCI filled in these areas with stockpiled material. Unfortunately, owls can return to the area, which they have done, so this item may require additional future work if needed.
This extra work item was for labor and equipment from 11/27/2023 through 12/6/2023 in MCI billing #9 (December).
RFI 2.1 Seismic Controller & Actuator Required Changes to Electrical: In response to RFI 2.1, MCI provided the required actuator revised by MBI TBD extension 4f project specifications. This requires changes to integrated equipment and $90,864.54 determined MBI updated electrical drawings. MCI provided this change order for after actuator additional costs to accommodate the updated actuator. on site Sub-Total $ 418,175.36
Total 418,175.36
Contract Amount 42,127,169.88
Total Contract Amount (Contract, CO1, CO2, C03 and CO4) 42,545,345.24 Esperanza Colio Warren, City Manager
City of Calexico, 608 Heber Avenue, Calexico, California Carlos Beltran, Construction Manager
Dynamic Consulting Engineers, 2415 Imperial Business Park Drive, STE B, Imperial, California Michael D. Fuller, President
Mountain Cascade, Inc., 555 Exchange Court, Livermore, CA ATTACHMENT NO. 2
CITY OF CALEXICO
PUBLIC WORKS DEPARTMENT
CHANGE ORDER NO. 5
Name of Project: New River Improvement Project - Calexico Reach RAIG
CALEXICO Name of Contractor: Mountain Cascade, Inc.
Date: June 5, 2024
# Description Price Price Time
Increase Decrease Extension
Substitution Request 001R3 - 72" Pipe Zone Soil Cement Backfill; Use of soil cement in lieu of ¾" rock, mirafi fabric and trench dam/cut off walls for the 72" NR Bypass pipeline. There is a cost savings of $198,096.72 per approved substitution request. However, additional cost savings may be obtained with re-evaluation of soil cement strength, to be determined. $ 198,096.72 0
Substitution Request 004, DIP to PVC C900 Pump Back Sewer Force Main.
Originally a no cost change order for using the plastic pipe. Subsequently, City added use of bell restraints at selected locations which results in a net 5b $ 30,017.17
increase of $30,017.17 agreed price for 40 restraints. Plan to restrain one joint on both sides of fittings with assumed 20 fittings. Final cost depends on how many restraints are constructed in place.
Standby Time Delay for Equipment due to 30" sewer crossing preventing 5c access for west slope excavation & hauling. From 12/01/23 through $ 80,749.62 12/31/23 in MCI billing #10 (January 2024).
Shoring Rental through January 31, 2024; in MCI billing #10 (January 2024).
Due to delays, MCI schedule to complete in November 2023 with removals 5d $ 34,500.00
December 2023. This monthly shoring rental starts January 2024 to continue until project completion.
Sub-Total $ 145,266.79 | $ 198,096.72
Total $ (52,829.93)
Contract Amount $ 42,545,345.24
[Total Contract Amount (Contract, C01, CO2, CO3, CO4 and CO5) I$ 42,492,515.31] Esperanza Colio Warren, City Manager
City of Calexico, 608 Heber Avenue, Calexico, California Carlos Beltran, Construction Manager
Dynamic Consulting Engineers, 2415 Imperial Business Park Drive, STE B, Imperial, California Michael D. Fuller, President
Mountain Cascade, Inc., 555 Exchange Court, Livermore, CA ATTACHMENT NO. 3
CITY OF CALEXICO
PUBLIC WORKS DEPARTMENT
CHANGE ORDER NO. 6
Name of Project: New River Improvement Project - Calexico Reach ELIE
CALEXICO Name of Contractor: Mountain Cascade, Inc.
Date: June 5, 2024
# Description Price Price Time
Increase Decrease Extension
Shotcrete of the four transition slopes in the diversion channel. The four transition slopes in diversion channel were built up with compacted class 2 aggregate base. Concern of risk to integrity of future storm events $ 37,087.50 6a eroding portions of the southerly compacted transition slopes due to the [potential large New River flows a temporary shotcrete was placed over transitions to protect the compacted transition slopes integrity.
All-weather surfacing class 2 base emergency access & detour route. The temporary detour access for the WWTP, Animal Shelter and airport hangar users for Animal Shelter Road closure during the 16" sewer force main required an all-weather access. This access is routed along the west side of the Calexico Airport, adjacent to the perimeter chain link fence, $ 74,541.94 6b using unimproved earthen roads adjacent to an IID All American Canal bank. The underlying soils are clayey/silts which are inaccessible when wet. Class 2 aggregate base material was determined the least expensive that would serve as all-weather surfacing for the detour and serve as an Shoring Rental February through May 2024; in MCI billing #11, 12 & 13 (May 2024). Due to delays, MCI schedule to complete in November 2023 6c with removals December 2023. This monthly shoring rental started $138,000.00 January 2024 in CCO 5, to continue until project completion. (Feb, March, April, May)
Sub-Total $ 249,629.44 $
Total $ 249,629.44
Contract Amount $ 42,492,515.31
Total Contract Amount (Contract, C01, CO2, CO3, CO4, C05 and C06) $ 42,742,144.75 Esperanza Colio Warren, City Manager
City of Calexico, 608 Heber Avenue, Calexico, California Carlos Beltran, Construction Manager
Dynamic Consulting Engineers, 2415 Imperial Business Park Drive, STE B, Imperial, California Michael D. Fuller, President
Mountain Cascade, Inc., 555 Exchange Court, Livermore, CA ATTACHMENT NO. 4
CITY OF CALEXICO
PUBLIC WORKS DEPARTMENT
CHANGE ORDER NO. 7
Name of Project: New River Improvement Project - Calexico Reach CALEXICO Name of Contractor: Mountain Cascade, Inc
RULEERINE Date: June 5, 2024
# Description Price Price Time
Increase Decrease Extension
This change order is a continuation of prior CCO's for change in conditions from what the site was like at time of bid. At the diversion structure by the trash rack, both sides of the New River were clear and had direct access for equipment and personnel. By the time the project started, security fencing and parking lot improvements were constructed for the 7a Calexico border crossing so that the East side of the River was completely $ 333,836.91 inaccessible. This caused additional work in previous CCO's and for this cCO, the need to bring in bigger, powerful equipment to finish the work.
This CCO 7 is for an original excavator-mounted sheet pile driver to a 200 ton crane, which is significantly larger to remove the cofferdam sheet piles from the east side of the New River.
Sub-Total $ 333,836.91 $
Total $ 333,836.91
Contract Amount $ 42,742,144.75
Total Contract Amount (Contract, C01, C02, CO3, CO4, CO5, C06 and CO7) $ 43,075,981.66 Esperanza Colio Warren, City Manager
City of Calexico, 608 Heber Avenue, Calexico, California Carlos Beltran, Construction Manager
Dynamic Consulting Engineers, 2415 Imperial Business Park Drive, STE B, Imperial, California Michael D. Fuller, President
Mountain Cascade, Inc., 555 Exchange Court, Livermore, CA